The relatively low 6-ish average rating might lead you believe this is a poor movie that's not worth your time, and that would be both doing the movie a disservice, and potentially cause you to miss out on something you would enjoy.
There is something of a limit to possible plots with submarine movies to be honest. The elements of anxiety and tension and some of the more obvious risks of being in a submarine at combat are well defined to anyone who has worked as, or with, a submariner or is well versed on those aspects of naval warfare pertaining to submarines. There ARE going to be some aspects of things you've seen in other submarine movies , it's unavoidable.
Nevertheless I feel that this movie, with it's undercurrent of something weird and disturbing going on introduces something to a submarine movie I've not seen before.
If you like movies that put you in tense, creepy situations with no obvious way to escape then this might be your movie.
Overall the acting and script were fine. I watched this again for the second time so I perhaps was left feeling that the tension would have benefitted from being ramped up even more, but I do remember being suitably chilled the first time I watched it.
This is a tense chiller, not really a horror, imo so it's important to set ones' expectations accordingly.
Definitely worth a watch if you like this style of movie. I would rate 7.5/10.
